- Letter from George W. Gekas, Bill Richardson, Sonny Callahan, and Ronald V. Dellums, United States House of Representatives to President Bill Clinton [on recommending Harold Varmus as NIH Director]1
- Letter from Gerald L. Epstein, United States Congress Office of Technology Assessment to Joshua Lederberg1
- Letter from Greg Tombline and Joshua Lederberg to Vittorio Sgaramella1
- Letter from James Deline to Joshua Lederberg1
- Letter from Jo Husbands, Committee on International Security and Arms Control (CISAC) to Joshua Lederberg1
- Letter from John B. Robbins, National Institute of Child Health and Human Development to Joshua Lederberg1
- Letter from Joshua Lederberg to Albert Rothenberg1
- Letter from Joshua Lederberg to Andy Marshall, United States Department of Defense1
- Letter from Joshua Lederberg to Ann Cook Ganesan1
- Letter from Joshua Lederberg to Arnold Ludwig1
- Letter from Joshua Lederberg to Bernard D. Davis1
- Letter from Joshua Lederberg to Bonnie Kaiser1
- Letter from Joshua Lederberg to C. G. Kurland1
- Letter from Joshua Lederberg to Christopher C. Joyner1
- Letter from Joshua Lederberg to D. A. Henderson, Public Health Service1
- Letter from Joshua Lederberg to David J. Galas, United States Department of Energy1
- Letter from Joshua Lederberg to E. R. Zumwalt1
- Letter from Joshua Lederberg to Elisa D. Harris1
- Letter from Joshua Lederberg to Elisa D. Harris, The Brookings Institution1
- Letter from Joshua Lederberg to Federico Mayor, United Nations Educational, Scientific and Cultural Organization1